# F&F CKF-317-TRMS Microprocessor Phase Sequence and Loss Monitor with Adjustable Asymmetry Threshold for DIN Rail

**URL:** https://aio.lv/en/product--ff-ckf-317-trms--12466455
**Data updated:** 2026-05-18 09:30 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** FF
**Manufacturer code:** CKF-317-TRMS
**EAN:** 5902431673585
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 32.99 €
**Prices and availability valid until:** 2026-07-25 23:59
**Price without VAT (21%):** 27.26 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-ckf-317-trms--12466455

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The F&F CKF-317-TRMS is a microprocessor-based phase sequence and loss monitor designed for three-phase electrical networks. It features True RMS measurement and an adjustable asymmetry threshold to protect equipment from phase failure or incorrect sequence. Designed for standard DIN rail mounting, this device ensures reliable monitoring and operational safety in industrial and residential electrical installations.

## Long description

The F&F CKF-317-TRMS is a high-precision microprocessor-based phase sequence and loss monitor engineered for three-phase electrical networks. By utilizing True RMS measurement technology, this device provides accurate monitoring of voltage parameters, ensuring that connected equipment is protected against phase failure, incorrect phase sequence, and voltage asymmetry. Its compact design allows for seamless integration into standard DIN rail electrical distribution boards, making it an essential component for maintaining operational safety in both industrial and residential environments.
Advantages
The primary benefit of this monitor is its ability to provide reliable protection through advanced microprocessor control and True RMS measurement, which remains accurate even in the presence of distorted waveforms. The adjustable asymmetry threshold allows users to customize the sensitivity of the device to match the specific requirements of their electrical installation, preventing nuisance tripping while ensuring rapid response to genuine faults. Its robust construction and standardized mounting format ensure long-term durability and ease of installation for electrical professionals.
Suitable for
Industrial motor protection systems
Residential three-phase power distribution boards
HVAC control panels
Automated manufacturing equipment
Backup power supply monitoring
When it may not be suitable
This device is specifically designed for three-phase electrical systems and will not function in single-phase applications. It is not intended for use in environments where the operating voltage or frequency falls outside the specified technical parameters of the unit.
Key specifications
Measurement method: True RMS
Mounting type: DIN rail (35 mm)
Monitored parameters: Phase sequence, phase loss, voltage asymmetry
Adjustable features: Asymmetry threshold
System compatibility: Three-phase networks
How to use
The device should be installed by a qualified electrician onto a standard 35 mm DIN rail within the distribution cabinet. Connect the three-phase power supply lines to the designated input terminals according to the wiring diagram provided with the unit. Once installed, adjust the asymmetry threshold dial to the desired sensitivity level based on the specific load requirements. The monitor will automatically begin checking the phase sequence and voltage levels upon power-up, activating the internal relay to allow or interrupt power to the load based on the detected status.
What to consider before purchase
Verify that your electrical system is a three-phase configuration
Ensure the DIN rail space is available in your distribution board
Check that the voltage levels of your network match the device specifications
Confirm if the adjustable asymmetry range meets your specific equipment protection needs
Usage recommendations
Regularly inspect the status indicators on the front panel to ensure the device is operating within normal parameters. If the monitor triggers a shutdown, verify the incoming phase voltages before attempting a reset to ensure the electrical fault has been resolved.

## FAQ

### How much does the F&F CKF-317-TRMS Phase Sequence and Loss Monitor cost, and is it available for purchase?

The price is 32.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 14 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All FF products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized FF service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12466455/68768567_large.webp